Fig 3.

Maximum-likelihood phylogeny of syndinean group I based on SSU rRNA. This tree contains 694 SSU sequences, of which 593 were from environmental clone libraries. These sequences were selected from a total of 1,258 based on a length of >690 bases, and redundant sequences (within two bases) were removed. Clade labels were based on data from reference 17. The two clades containing sequences attributed to Euduboscquella and Ichthyodinium were the only sequences from identified taxa, and those GenBank numbers are underlined. Bootstrap values greater than 60% are shown above the branches. See the supplemental material for an uncompressed version of the tree in Newick format.